首要污染物o3有哪些

英语翻译什么时态?为什? 现在完成时中一定要加have/has吗?看到一个填空：They already _____(leave).怎么填? 乡村和城市的本质区别是（ ）单项选择A、 人口多少不同 B、建筑形态不同 C、产业类型不同 D、文化水平不同 英语翻译中文歌名是谁知道中文翻译? I'm a-- I con't come to your party because I have to do my homework.We can't take photos w -- bwcause the light is b---怎么填呢 The fammer in the dell 的中文意思... the farmer in dell的歌词是首儿歌!中文叫山谷里的农夫 A farmer finds a snake on the ground的中文意思是 只喜欢一心一意,翻译英语 把红色、蓝色透明塑料片叠放在一起,透过什么颜色的光初二物理人教版P52想想做做是品红还是透不过 把红色透明塑料片放在阳光下透过的是___颜色的光；把蓝色透明塑料片放在阳光下透过的是___颜色的光；把绿色透明塑料片放在阳光下透过的是___颜色的光. 总结：透明物体只能透过___________ Because i regarded you as my brother , do you know ? And i want we are friend forever ! Are you agree ? ～yes什么意思 歌词because we are brothers ,because we are friends在世界地理频道听到的 “You are my brothers,my friend”这首歌的歌词一部分,求歌名好像是女生唱的,英文歌,节奏有点欢快,求歌名, 英语翻译 把英文翻译成中文pricing for the pearl necklet pricing I am a soldier and i'm marching on I am awarrior翻译中文 红色塑料跑道和蓝色塑料跑道除了颜色区别外,主要的区别在哪里? “I have three times as many as you”中的as是什么意思? i have three times as many as you 为什么不是as much as? I have three times as many as you.中的times什么意思及为什么会有 写出"铺"字的正确读音? There are three times as many girls as boys.这句话用倍数表达法的另外两种形式怎么表达? Great changes took place in our city since 1980.时态 翻译 翻译：he took a quick tour of the Great Wall 英语翻译A new painting was hanging in the Hemlock Mills Art Gallery.Throughout the day,visitors stood before the new exhibit and thought hard as to what it was trying to show.　　“I think it’s a terrifying monster,” said Misty.“There’ 把红、黄、绿透明塑料片的任意两片塑料片叠在一起,透过的是什么颜色的光如题把红色，蓝色，绿色透明片放在阳光下，各透过红、蓝、绿色的光。将任意两片透明塑料片叠在一起，将没有 ( A.love B.like C.gland D.dear ) .Another reason people like home cooking is that it is often a way of showing 把红蓝两片透明的塑料片叠在一起,透过的是什么颜色?凸透镜成放大的实像时,物距跟像距相比,那个较大? 关联词 就算······（ ）······ 不但.还 是不是关联词急 急 急 最好在4月17号给我答案 高口,BEC高级,catti二级和三级它们的难易顺序是怎么排的呢?包括对词汇量和对口语的要求~